Limited to <= 1, because as QMany said - Pelini is going to defend the pass and dare Langsford to run...and I think he runs 75/25 split so TA's attempts (opportunities for mistakes) are greatly reduced. 15' wins if Pelini drops 6-7, and rushes only 4 w/ his "contain" DL scheme - which you know is how he would play it.
This is the thing with Pelini's D that bothered me, it was easily exploited because it was defended in such a lopsided way to one component of the game. It became glaringly obvious when the BTN did the interview w/ the Minnesota DC (IIRC), I think before our game, and he essentially spelled out how he was going to beat us with motioning a man out of the backfield then run up the middle and use short crossing routes across the middle all game. Sure enough, it was there all day.
Plus, lets not forget the jet sweep...a huge component of Riley's offense and essentially a guaranteed 10 yards against Pelini's D.